JP2000125336A - Radio communication system and its method for incoming call control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely stop ringing of other radio terminals than a terminal making a reply and to ensure communication with the replied terminal, when a radio terminal contained in the radio communication system is busy and simultaneous incoming call processing to other radio terminals is executed. SOLUTION: When simultaneous calls are executed for radio terminals 111 registered as extensions and a reply from an optical radio terminal is received, an available idle sot is detected. When the number of the idle slot is one, communication with the replied radio terminal is interrupted, ringing of other terminals than the replied radio terminal is stopped, and a radio channel is individually set up again with the replied terminal. Or after communication is set up with the replied radio terminal, speech channel changeover processing is executed, and ringing of other terminals than the replied radio terminal is stopped and communication is set up again with the replied radio terminal succeedingly during speech channel switching processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to incoming call control at the time of simultaneous incoming call in a wireless communication apparatus accommodating a plurality of wireless terminals.

[0002]

2. Description of the Related Art In recent years, personalization of wireless telephone terminals has progressed, and analog wireless systems have become mainstream. Recently, digital wireless systems have been shifted to digital systems which are excellent in speech quality and privacy. .

One of the digital wireless telephone terminal services is a personal handy system (hereinafter referred to as PH).
S). This PHS system is used not only outdoors but also as a self-employed system by installing a dedicated base station at an office and a wireless communication device (master unit) capable of accommodating a commercially available PHS at home. .

FIG. 12 is an explanatory diagram showing an example of using such a wireless telephone terminal at home.

In FIG. 1, a wireless communication device 1001 is a home wireless communication device having a telephone function and capable of accommodating a commercially available PHS terminal. The telephone line 102 is a wireless communication device 1
001 is a general subscriber line / private branch exchange. The wireless terminal 111 is connected to the wireless communication device 1001 via a wireless line.

A commercially available PH provided by each manufacturer
Even if the S terminal is a wireless terminal of a different manufacturer,
Since the control protocol and message standardized by STD-28 are used, it can be accommodated as a slave unit of the system in a business-use base station or a home wireless communication device (master unit) which is a private system. .

Recently, among wireless communication apparatuses capable of accommodating the above-mentioned commercially available PHS terminals, wireless communication apparatuses accommodating an ISDN line in a home base unit in a form supported by the spread of the Internet have been developed by manufacturers. Provided by

[0008] In most cases, in consideration of the cost, the wireless communication device uses one system of the RF module as the wireless transmission / reception unit. As a result, the T of one RF module
Due to the slot usage conditions in the DMA / TDD frame system (adjacent slots cannot be used), two out of four slots are used for each of uplink and downlink,
Up to two communications can be used.

[0009]

However, the above I
In a wireless communication device that accommodates an SDN line and can perform a maximum of two communications, since the RF module is controlled by one system,
When a simultaneous incoming call process to another wireless terminal is performed while one wireless terminal accommodated as a slave unit is being used, an incoming call for stopping incoming call ringing to a wireless terminal other than the responding terminal is received. (Ring stop) Since a message cannot be transmitted, there is a problem that ringing of a wireless terminal other than the terminal that responded cannot be stopped.

Hereinafter, the problem that the incoming call (ringing stop) message cannot be transmitted will be described with reference to FIGS. FIG. 2 is a block diagram of the wireless communication device, and FIG. 3 is a block diagram of the wireless terminal. 4 and 5 are explanatory diagrams for explaining the operation of the used slot. FIG. 6 is a sequence chart.
M and CC indicate radio management, mobility management, and call control of the layer 3 standard in RCRSTD-28.

In FIG. 2, a radio communication apparatus 101 includes an antenna 201 for transmitting and receiving radio data, a receiving section 202 for receiving radio data, a transmitting section 203 for transmitting radio data, a modulation of transmission data and a modulation of reception data. Channel C for performing modulation and demodulation for demodulation, TDMA processing such as frame disassembly / assembly, error correction, and scrambling
An ODEC unit, a first baseband IC 204 including an audio processing unit that performs compression encoding processing and decompression decoding processing of audio data, and a second baseband having the same function as the first baseband IC 204 An office line interface 206 for accommodating an IC 205 and a telephone line 102 such as a general subscriber line and a private branch exchange in the wireless communication apparatus 101.
And ROM (Read Only Memo) storing various programs
ry) 207 and a RAM (Rand) for storing various control information and the like.
am Access Memory) 208 and a control unit 209 for controlling each unit.

[0012] On the other hand, in FIG.
Receiving section 301, transmitting section 302, antenna 303 for transmitting and receiving wireless data, and receiving section 3 for receiving wireless data
04, a transmission unit 305 for transmitting wireless data, a modulation / demodulation unit for modulating transmission data and demodulating received data, TDMA processing such as frame disassembly / assembly, and error correction processing.
A channel CODEC unit for performing a scramble process, a baseband IC 306 including a voice processing unit for performing a compression encoding process and a decompression decoding process of audio data, a display unit 309 indicating a state of data communication, and a dial information input unit 310 and a ROM (Read Onl) storing various programs.
y Memory) 307 and RA for storing various control information and the like.
It has an M (Randam Access Memory) 308, a data communication interface unit 309, a dial input unit 310 used when making outgoing calls and setting other data, and a control unit 311 for controlling each unit.

As shown in FIGS. 4 to 6, first, a state in which a wireless channel is established between the data terminal 113A and the wireless communication device 101 via the wireless terminal 111A using the first baseband IC 204. In (FIG. 4A, terminal communication: slot use state 401), the wireless communication apparatus 101 receives an incoming call from the telephone line 102 by the line interface unit 206.

The line interface unit 206 notifies the control unit 209 of the incoming call. When the wireless communication device 101 detects the incoming call, it analyzes the incoming call based on the call processing program stored in the ROM 207.

Next, a plurality of wireless terminals 111 accommodated in the extension
RAM 2 in which data related to (A to X) is stored
08 based on the information of the wireless terminal 111 (B-
X) second baseband IC 205 usable for
And an antenna 201 via a wireless data transmitting unit 203.
The incoming call messages (M601 and M602) are transmitted (FIG. 4B) Simultaneous reception of accommodated terminals: slot use state 4
02).

Radio terminals 111B and 111X receiving call messages (M601 and M602) by antenna 303
This is called the wireless receiving unit 304, the baseband IC 306
Is notified to the control unit 311 via. The control unit 311 that has received the incoming call message sounds the incoming call based on the call processing program stored in the ROM 307 and based on the information in the RAM 208 and displays the incoming call to the terminal user. .

Thereafter, when the control unit 311 detects that the user goes off-hook for a response, the baseband IC
306 and a link channel establishment message (M603) from the antenna 303 via the wireless data transmission unit 304
Send

The wireless communication apparatus 101 sends a link channel establishment message (M603) to the control unit 3 via the antenna 303, the wireless reception unit 202, and the baseband IC 205.
11, a link channel assignment message (M604) is transmitted to the responding wireless terminal 111B,
A wireless link is established in a link channel establishment phase (LCH).

After the LCH is established, a synchronous burst signal (M605, M605) is transmitted between the responding wireless terminal 111B and the wireless communication device 101.
M606) to establish synchronization. Continue with SABM
A signal (M607) and a UA signal (M608) are used to control LAPDC (Link Acces
s Procedure for Digital Cordless).

After the LCH is established, the radio terminal 111B responds to the incoming call (M601) by receiving a call response message (M6).
09) is transmitted to the wireless communication apparatus 101 (terminal response: slot use state 403 in FIG. 5C).

The radio communication apparatus 101 which has received the call response message (M609) receives the call response message (M609).
Check the use condition of 4.

At this time, if a wireless line is established with the responding wireless terminal even though the other baseband IC 204 is in use, the adjacent slot cannot be used,
Since there is no available downlink slot, the ringing of the other ringing wireless terminal 111X cannot be stopped. That is, an incoming call (linger ringing stop) message (M
610) cannot be transmitted (FIG. 5 (D) continuation of ringing: slot use state 404).

Therefore, as means for avoiding the above problems, a wireless terminal having a unique interface in a private mode between a wireless communication device and a wireless terminal (slave) instead of a commercially available PHS terminal. However, from the viewpoint of the user, it is uneconomical that the existing PHS terminal cannot be registered in the slave unit.

Further, it is conceivable that only a specific wireless terminal rings when an incoming call is received. However, since the state of the corresponding wireless terminal (power-off, taking out due to going out, etc.) cannot be specified, the incoming call becomes invalid, and important Communication is no longer ensured.

As described above, at present, there is no appropriate avoidance means, and the above problem has not been solved.

Accordingly, the present invention relates to a portable telephone set accommodated as a slave unit.
When a simultaneous incoming call to another wireless terminal is executed while one wireless terminal is being used, the ringing of wireless terminals other than the responding terminal is reliably stopped without using a wireless terminal employing a unique protocol Further, it is another object of the present invention to provide a wireless communication device capable of reliably performing communication with a terminal that has responded, and a method for controlling an incoming call thereof.

[0027]

SUMMARY OF THE INVENTION The present invention relates to a radio communication apparatus for accommodating a plurality of lines, accommodating a plurality of radio terminals, and simultaneously receiving calls to the plurality of radio terminals. Receiving a response to the simultaneous incoming call from, detecting an available empty slot at the time of receiving the response, if the number of available empty slots is equal to or less than a predetermined number, disconnects the communication with the responding wireless terminal, Further, a ringing of a terminal other than the responding wireless terminal is stopped, and an incoming call is individually made to the responding wireless terminal.

According to the present invention, there is provided an incoming call control method for a wireless communication apparatus accommodating a plurality of lines and accommodating a plurality of wireless terminals and performing simultaneous incoming call to the plurality of wireless terminals. After receiving a response to the simultaneous incoming call from the mobile terminal, detecting an available empty slot at the time of receiving the response, and if the number of available empty slots is equal to or less than a predetermined number, after establishing communication with the responding wireless terminal, Executing a communication channel switching process, stopping the ringing of terminals other than the responding wireless terminal, and re-establishing communication with the switching wireless terminal responding to the incoming call. I do.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of a wireless telephone system according to one embodiment of the present invention. In this embodiment, a PHS will be described as an example.

As shown in the figure, the present system includes a wireless communication apparatus 101, a telephone line 102 such as a general subscriber line and a private branch exchange housed in the wireless communication apparatus 101, and a wireless communication apparatus 101 and a wireless line. Wireless terminal 111 to be connected
And a data terminal 112 connected to the wireless terminal 110.

FIG. 2 is a block diagram showing the configuration of the wireless communication device 101.

As shown, the wireless communication apparatus 10 of the present embodiment
Reference numeral 1 denotes an antenna 201 for transmitting and receiving wireless data, a receiving unit 202 for receiving wireless data, a transmitting unit 203 for transmitting wireless data, a modulation and demodulation unit for modulating transmission data and demodulating received data, and a frame decomposition / demodulation unit. TD for assembly etc.
A first baseband IC 204 including a channel CODEC unit for performing MA processing, error correction processing, and scrambling processing, and an audio processing unit for performing compression encoding processing and decompression decoding processing of audio data; IC20
Second baseband IC 205 having the same function as
And telephone lines 102 such as general subscriber lines and private branch exchanges.
Line interface 2 that accommodates
06 and ROM (Read Only) storing various programs
Memory) 207 and a RAM for storing various control information and the like
(Randam Access Memory) 208 and a control unit 209 for controlling each unit.

FIG. 3 is a block diagram showing a configuration of the wireless terminal 111.

As shown, the wireless terminal 111 of this embodiment is
Is a receiving unit 301, a transmitting unit 302, an antenna 303 for transmitting and receiving wireless data, a receiving unit 304 for receiving wireless data, a transmitting unit 305 for transmitting wireless data, a modulation of transmission data and It includes a modulation / demodulation unit for demodulation, a channel CODEC unit for performing TDMA processing such as frame disassembly / assembly, error correction processing, and scrambling processing, and an audio processing unit for performing audio data compression encoding processing and decompression decoding processing. Baseband IC 306
Display unit 309 indicating the state of data communication, dial information input unit 310, and ROM storing various programs
(Read Only Memory) 307, a RAM (Randam Access Memory) 308 for storing various control information, etc., a data communication interface unit 309, a dial input unit 310 used when making outgoing calls and setting other data, A control unit 311 for performing control. [First Embodiment] Next, the operation of the first embodiment of the present invention having the above configuration will be described with reference to FIGS.

FIGS. 4, 7, and 8 are explanatory diagrams for explaining the operation of the used slot in the first embodiment of the present invention.
It shows the state of each slot of a used channel during communication in the TDMA / TDD transmission method. 6, 9 and 10 are sequence charts showing the operation in the first embodiment of the present invention, and FIG. 11 is a flowchart showing the processing in the wireless communication device 101 of the first embodiment of the present invention. is there. Each of the above drawings shows only a main part related to the present invention, and a detailed description of control and communication operations not related to the present invention will be omitted.

First, a state in which a wireless channel is established between the data terminal 113A and the wireless communication device 101 via the wireless terminal 111A using the first baseband IC 204 (FIG. 4A: during terminal communication: Slot usage status 40
In 1), it is assumed that the wireless communication apparatus 101 receives an incoming call from the telephone line 102 by the line interface unit 206. Here, the line interface unit 206 notifies the control unit 209 of the incoming call, and when the wireless communication device 101 detects the incoming call (S901: YES), it analyzes the incoming call based on the call processing program stored in the ROM 207.

Next, a plurality of wireless terminals 11 accommodated in the extension
RAM storing data related to 1 (A to X)
The wireless terminal 111 (B-
X) second baseband IC 205 usable for
And an antenna 201 via a wireless data transmitting unit 203.
Then, an incoming call message (M601, M602) is transmitted (S902, simultaneous receiving of accommodated terminals in FIG. 4B: slot use state 402).

Radio terminals 111B, 111X receiving incoming messages (M601, M602) by antenna 303
Notifies the control unit 311 via the wireless reception unit 304 and the baseband IC 306. The control unit 311 that has received the incoming call message sounds the incoming call based on the call processing program stored in the ROM 307 and based on the information in the RAM 208 and displays the incoming call to the terminal user. .

Thereafter, when the control unit 311 detects that the user goes off-hook for a response, the baseband IC
306 and a link channel establishment message (M603) from the antenna 303 via the wireless data transmission unit 304
Is transmitted (S903).

Radio communication apparatus 101 transmits a link channel establishment message (M603) via antenna 303, radio reception section 202 and baseband IC 205 to control section 3
11, a link channel assignment message (M604) is transmitted to the responding wireless terminal 111B,
A wireless link is established in a link channel establishment phase (LCH) (S903: YES). At this time, if the establishment of the wireless link has failed (S903: NO), a disconnection process for releasing the wireless line with the wireless terminal 111B that has responded is executed (S904).

After the LCH is established, a synchronous burst signal (M605, M605) is transmitted between the responding wireless terminal 111B and the wireless communication device 101.
M606) to establish synchronization. Continue with SABM
A signal (M607) and a UA signal (M608) are used to control LAPDC (Link Acces
s Procedure for Digital Cordless).

After the LCH is established, the radio terminal 111B responds to the incoming call (M601) by receiving an incoming call response message (M6).
09) is transmitted to the wireless communication apparatus 101 (FIG. 7 (a) receiving terminal selection: slot use state 501). At this time, the wireless communication apparatus 101 transmits the incoming call response message (M609).
Is not received within a predetermined time (S905: N
O), a disconnection process for releasing the wireless channel with the wireless terminal 111B that has responded is executed (S904).

Radio communication apparatus 101 that has received the call response message (M609) (S905: YES) confirms the use state of the other baseband IC 204.

Here, the other baseband IC 204
Is empty (S906: NO), an incoming call (ringing stop) message (M610) is transmitted to the PHS terminal other than the answering terminal. Subsequently, the wireless communication device 10
1 sends a call setup message (M611) to the responding wireless terminal 1
11B.

Response wireless terminal 1 receiving the message
11B transmits the call setting acceptance message (M612) and the secret key setting message (M613) to the wireless communication apparatus 101.
Send to Wireless communication device 1 receiving the message
01 transmits an authentication request message (M614) to the response wireless terminal 111B.

Responding wireless terminal 1 receiving the message
11B is an authentication response message (M615), a call message (M616), and a response message (M617)
Is transmitted to the wireless communication apparatus 101.

The wireless communication device 1 that has received the message
01 is a response confirmation message (M618) and DIS
The C signal (M619) is transmitted to the response wireless terminal 111B.

Response wireless terminal 1 receiving the message
11B transmits the UA signal (M620) to the wireless communication device 101.
To the wireless communication device 101 and the wireless terminal 111B.
Is in communication (M621).

As described above, the normal incoming call processing is performed on the wireless answering terminal (111B) responding to the incoming call (S
908). Thereafter, the communication state is established.

On the other hand, when the other baseband IC 204 is in use (S906: YES), a wireless channel disconnection message (M701) is transmitted to wireless terminal 111B.

Wireless channel disconnection message (M701)
The wireless terminal 111B that has received the message transmits a wireless channel disconnection completion message (M702) to the wireless communication apparatus 101, and releases the LCH. Subsequently, the DISC signal (M7
03), the LAPDC which is the protocol control procedure of the layer 2 is released by the UA signal (M704), and a temporary disconnection process to the response terminal is performed (S909). Thereafter, an incoming call (ringing stop) message (M705) is transmitted to the PHS terminal (111X) other than the answering terminal (S910).
(FIG. 7B: Incoming Call Suspension Processing: Slot Usage State 5)
02).

After temporarily stopping the simultaneous incoming call processing, the wireless communication apparatus 101 sets the response terminal (111)
Send an incoming call message (M801) individually to B) (FIG. 7 (c) Individual incoming start: slot use state 5)
93).

The wireless terminal 111B that has received the incoming call message (M801) receives the incoming call message (M801),
The control unit 311 is notified via C306. The control unit 311 that has received the incoming call message sounds the incoming call based on the call processing program stored in the ROM 307 and based on the information in the RAM 208 and displays the incoming call to the terminal user. .

If wireless communication apparatus 101 can respond to the incoming call, it transmits a link channel establishment message (M603) from antenna 303 via baseband IC 306 and wireless data transmission section 304.

Upon receiving the link channel establishment message (M603), the wireless communication apparatus 101 transmits a link channel assignment message (M604) to the responding wireless terminal 111B, and establishes a wireless link in the link channel establishment phase (LCH). Establish.

After the LCH is established, a synchronization burst signal (M605, M605) is transmitted between the responding wireless terminal 111B and the wireless communication device 101.
M606) to establish synchronization. Continue with SABM
A signal (M607) and a UA signal (M608) establish LAPDC, which is a protocol control procedure of Layer 2.

After the LCH is established, the wireless terminal 111B responds to the incoming call (M601) by an incoming call response message (M6).
09) to the wireless communication apparatus 101.

After receiving the call response message (M609), the wireless communication apparatus 101 sends messages M611 to M620 to the response terminal responding to the call in the same manner as when the other baseband IC 204 is empty. (S911), and transits to the communicating state (M621) (FIG. 7 (d), during selected terminal communication: slot use state 504). [Second Embodiment] Next, the operation of the second embodiment of the present invention will be described with reference to FIGS.

FIGS. 4, 13 and 14 are explanatory diagrams for explaining the operation of the used slots in the second embodiment of the present invention, and show the state of each slot of the used channel during communication in the TDMA / TDD transmission system. Is shown. Also, FIG.
FIG. 15 is a sequence chart showing an operation in the second embodiment of the present invention, and FIG. 16 is a flowchart showing a process in the wireless communication device 101 of the second embodiment of the present invention. Each of the above drawings shows only a main part related to the present invention, and a detailed description of control and communication operations not related to the present invention will be omitted. FIG. 7A is referred to in the following description.

First, a state in which a wireless channel is established between the data terminal 113A and the wireless communication device 101 via the wireless terminal 111A using the first baseband IC 204 (FIG. 4A: during terminal communication: Slot usage status 40
In 1), the wireless communication apparatus 101
Is received by the line interface unit 206.

Here, the line interface unit 206 notifies the control unit 209 of the incoming call, and
Detects the incoming call (S901: YES),
Incoming call is analyzed based on the call processing program stored in 07.

Next, a plurality of wireless terminals 111 accommodated in the extension
RAM 2 in which data related to (A to X) is stored
08 that can receive a call based on the information of 08 (BX)
A call message (M601, M602) is transmitted from the antenna 201 via the second baseband IC 205 and the wireless data transmission unit 203 which can be used for
902, FIG. 4 (B) simultaneous reception of accommodated terminals: slot use state 402).

Radio terminals 111B, 111X receiving the incoming messages (M601, M602) by antenna 303
This is called the wireless receiving unit 304, the baseband IC 306
Is notified to the control unit 311 via. When the control unit 311 receives the incoming call message, it can ring the incoming call based on the call processing program stored in the ROM 307 and based on the information in the RAM 208, and can ring the incoming call to the terminal user. Display.

Thereafter, when the control unit 311 detects that the user goes off-hook for a response, the baseband IC
306 and a link channel establishment message (M603) from the antenna 303 via the wireless data transmission unit 304
Is transmitted (S903).

Radio communication apparatus 101 transmits link channel establishment message (M 603) to control section 3 via antenna 303, radio reception section 202 and baseband IC 205.
11, a link channel assignment message (M604) is transmitted to the responding wireless terminal 111B,
A wireless link is established in a link channel establishment phase (LCH) (S903: YES). At this time, if the establishment of the wireless link has failed (S903: NO), a disconnection process for releasing the wireless line with the wireless terminal 111B that has responded is executed (S904).

After the LCH is established, a synchronous burst signal (M605, M605) is transmitted between the responding radio terminal 111B and the radio communication apparatus 101.
M606) to establish synchronization. Continue with SABM
A signal (M607) and a UA signal (M608) establish LAPDC, which is a protocol control procedure of Layer 2.

After the LCH is established, the radio terminal 111B responds to the incoming call (M601) by the incoming call response message (M6).
09) is transmitted to the wireless communication apparatus 101 (FIG. 7 (a) receiving terminal selection: slot use state 501). At this time, the wireless communication apparatus 101 transmits the incoming call response message (M609).
Is not received within a predetermined time (S905: N
O), a disconnection process for releasing the wireless channel with the wireless terminal 111B that has responded is executed (S904).

Radio communication apparatus 101, having received the call response message (M609) (S905: YES), checks the use state of the other baseband IC 204.

Here, the other baseband IC 204
Is empty (S906: NO), an incoming call (ringing stop) message (M610) is transmitted to the PHS terminal other than the answering terminal (S907). Subsequently, wireless communication apparatus 101 transmits a call setting message (M611) to answer wireless terminal 111B.

The response wireless terminal 1 that has received the message
11B transmits the call setting acceptance message (M612) and the secret key setting message (M613) to the wireless communication device 10B.
Send to 1. The wireless communication device 101 that has received the message transmits an authentication request message (M614) to the responding wireless terminal 111B.

Response wireless terminal 1 receiving the message
11B is an authentication response message (M615), a call message (M616), and a response message (M617)
Is transmitted to the wireless communication apparatus 101.

Radio communication apparatus 1 receiving the message
01 is a response confirmation message (M618) and DIS
The C signal (M619) is transmitted to the response wireless terminal 111B.

Response wireless terminal 1 receiving the message
11B transmits the UA signal (M620) to the wireless communication device 101.
And thereafter, the wireless communication apparatus 101 and the wireless terminal 1
11B, the communication state is established (M621).

As described above, the normal incoming call processing is performed on the radio response terminal (111B) responding to the incoming call (S
908).

On the other hand, the other baseband IC 204
If it is in use (S906: YES), M61 is exchanged with the response wireless terminal 111B as in the case of the above-mentioned vacancy.
Normal incoming call processing is performed by transmitting and receiving messages 1 to M620 (S1301), and a communication state (M1201)
(FIG. 13 (a) Response terminal communication in progress: slot use state 1101).

Next, radio communication apparatus 101 transmits a radio channel switching instruction message (M1202) to radio terminal 111.
B, and then the synchronization burst signal (M12
03) to perform channel switching processing (S130).
2). Wireless channel switching instruction message (M1202)
Wireless terminal 111B that has received the indefinite burst signal (M
1204) (FIG. 13 (b) channel switching processing: slot use state 1102).

The wireless communication apparatus 101, which has confirmed that the slot has become usable, turns on the ringing wireless terminal 111.
An incoming call (sound stop) message (M1205) is transmitted to stop the ringing of X (S1303) (FIG. 14).
(C) Sound stop processing: slot use state 1103).

Thereafter, radio communication apparatus 101 shifts to the channel for which switching has been instructed, and transmits a synchronization burst signal (M120).
6) is received. Similarly, the responding wireless terminal 111B also receives the synchronization burst signal (M1207) and continues to receive the SABM
A signal (M1208) is transmitted. Upon receiving the SABM signal, the wireless communication device 101 transmits the UA signal (M120
9) to the wireless terminal 111B, establishes LAPDC, which is a protocol control procedure of Layer 2, and performs a channel switchback process (S1304). Thereafter, the state becomes the communicating state (M1210) (FIG. 14D).
Slot use state 1104). [Other Embodiments] In the above-described first and second embodiments, the simultaneous incoming call processing when an outside call is received is described. However, the present invention relates to the simultaneous incoming call processing from any wireless terminal accommodated in an extension. Is similarly applicable.

During or before or after the operation according to the first and second embodiments, a voice response or a talkie service is executed to the caller side to notify the progress of the connection. You may.

[0080]

As described above, according to the present invention, when a simultaneous incoming call to a wireless terminal registered as an extension is executed and a response from any wireless terminal is received, an available empty slot is detected. When the number of empty slots is, for example, one, (1) disconnect the communication with the responding wireless terminal, stop the ringing of the terminals other than the responding wireless terminal, and re-establish the radio individually with the responding terminal. Or (2) performing communication channel switching processing after establishing communication with the responding wireless terminal, stopping the ringing of the terminals other than the responding wireless terminal, and subsequently continuing the responding wireless communication processing during the communication channel switching processing. Communication was reestablished with the terminal.

Therefore, there is an effect that the ringing of the wireless terminal that has been ringing is reliably stopped, and communication with the responding terminal is established, so that a loss of an important incoming call can be avoided.

Further, since a commercially available terminal can be accommodated in the extension without changing the standard protocol of the existing terminal, it is necessary to use a PHS wireless terminal adopting a unique protocol for the system, for example, a system cordless for business use. It also has the effect of being economical.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wireless telephone system according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless communication device provided in the system shown in FIG.

FIG. 3 is a block diagram showing a configuration of a wireless terminal provided in the system shown in FIG. 1;

FIG. 4 is an explanatory diagram illustrating an operation of a used slot in the first and second embodiments of the present invention.

FIG. 5 is an explanatory diagram illustrating an operation of a used slot in a conventional example.

FIG. 6 is a sequence chart showing an operation in the first and second embodiments of the present invention.

FIG. 7 is an explanatory diagram illustrating an operation of a used slot in the first embodiment of the present invention.

FIG. 8 is an explanatory diagram illustrating an operation of a used slot in the first embodiment of the present invention.

FIG. 9 is a sequence chart showing an operation in the first embodiment of the present invention.

FIG. 10 is a sequence chart showing an operation in the first embodiment of the present invention.

FIG. 11 is a flowchart showing a process in the wireless communication device according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an example of using a conventional wireless telephone terminal at home.

FIG. 13 is an explanatory diagram illustrating an operation of a used slot in the second embodiment of the present invention.

FIG. 14 is an explanatory diagram illustrating an operation of a used slot in the second embodiment of the present invention.

FIG. 15 is a sequence chart showing an operation in the second embodiment of the present invention.

FIG. 16 is a flowchart illustrating a process in the wireless communication device according to the second embodiment of the present invention.

[Explanation of symbols]

 101: wireless communication device, 102: telephone line, 111: wireless terminal, 112: data terminal.

Claims (10)

[Claims] 1. A wireless communication apparatus accommodating a plurality of lines, accommodating a plurality of wireless terminals, and performing a simultaneous incoming call to the plurality of wireless terminals, wherein a response to the simultaneous incoming call from an arbitrary wireless terminal is received. Response receiving means, and an empty slot detecting means for detecting an available empty slot when receiving a response from the arbitrary wireless terminal; and, as a result of the detection of the empty slot, the number of available empty slots is equal to or less than a predetermined number. In the case, the disconnecting means for disconnecting the communication with the responded wireless terminal, and when the number of available empty slots is equal to or less than a predetermined number, sound stopping means for stopping the sound of terminals other than the responding wireless terminal, Individual receiving means for individually receiving the responding wireless terminal when the number of available empty slots is equal to or less than a predetermined number. Wireless communication device. 2. A wireless communication device accommodating a plurality of lines, accommodating a plurality of wireless terminals, and performing a simultaneous incoming call to the plurality of wireless terminals, wherein a response to the simultaneous incoming call from an arbitrary wireless terminal is received. Response receiving means, and an empty slot detecting means for detecting an available empty slot when receiving a response from the arbitrary wireless terminal; and, as a result of the detection of the empty slot, the number of available empty slots is equal to or less than a predetermined number. Communication channel switching processing means for executing a communication channel switching process after establishing communication with the responding wireless terminal, and when the number of available empty slots is equal to or less than a predetermined number, other than the responding wireless terminal. Ringing stopping means for stopping the ringing of the terminal; and when the number of available empty slots is equal to or less than a predetermined number, the channel is switched in response to the incoming call. Radio communication apparatus characterized by having a re-communication reestablishment means for establishing a communication between the wireless terminal. 3. The wireless communication between the wireless terminal and the wireless communication device according to claim 1,
A wireless communication device, which performs the communication by a DMA / TDD method. 4. The wireless communication device according to claim 1, wherein the predetermined number is one. 5. An incoming call control method for a wireless communication apparatus accommodating a plurality of lines, accommodating a plurality of wireless terminals, and performing a simultaneous incoming call to said plurality of wireless terminals. Receiving a response to the response, detecting an available empty slot at the time of receiving the response, disconnecting the communication with the responding wireless terminal when the number of available empty slots is equal to or less than a predetermined number, and Stopping the ringing of a terminal other than the wireless terminal that has made the call, and further receiving an individual call to the wireless terminal that has responded. 6. An incoming call control method for a wireless communication device accommodating a plurality of lines, accommodating a plurality of wireless terminals, and performing a simultaneous incoming call to said plurality of wireless terminals, comprising: a simultaneous incoming call from an arbitrary wireless terminal; Receiving a response to the response, detecting an available empty slot at the time of receiving the response, and when the number of available empty slots is equal to or less than a predetermined number, establishing communication with the responding wireless terminal and then performing a communication channel switching process. And stopping the ringing of terminals other than the responding wireless terminal, and re-establishing communication with the channel-switching wireless terminal responding to the incoming call. Incoming control method. 7. The wireless communication between the wireless terminal and the wireless communication device according to claim 5,
An incoming call control method for a wireless communication apparatus, wherein the incoming call is controlled by a DMA / TDD method. 8. The incoming call control method for a wireless communication device according to claim 5, wherein the predetermined number is one. 9. A computer-readable storage for accommodating a plurality of lines, accommodating a plurality of wireless terminals, and storing a program for controlling an incoming call of a wireless communication device that performs simultaneous incoming calls to the plurality of wireless terminals. In the medium, a response receiving step of receiving a response to a simultaneous incoming call from an arbitrary wireless terminal; an empty slot detecting step of detecting an available empty slot when receiving a response from the arbitrary wireless terminal; and detecting the empty slot. As a result, if the number of available empty slots is equal to or less than a predetermined number, a disconnection step of disconnecting communication with the wireless terminal that has responded, and if the number of available empty slots is equal to or less than a predetermined number, A ringing stop step of stopping ringing of a terminal other than the wireless terminal; and if the number of available empty slots is equal to or less than a predetermined number, the responded wireless Storage medium characterized by storing a program for executing the individual incoming process incoming separately for youngest. 10. A computer-readable storage device for accommodating a plurality of lines, accommodating a plurality of wireless terminals, and storing a program for controlling an incoming call of a wireless communication device that performs simultaneous incoming calls to the plurality of wireless terminals. In the medium, a response receiving step of receiving a response to a simultaneous incoming call from an arbitrary wireless terminal; an empty slot detecting step of detecting an available empty slot when receiving a response from the arbitrary wireless terminal; and detecting the empty slot. As a result, when the number of available empty slots is equal to or less than a predetermined number, a communication channel switching process step of performing a communication channel switching process after establishing communication with the responding wireless terminal; When the number is equal to or less than a predetermined number, a ringing stop step of stopping ringing of a terminal other than the responding wireless terminal; and When the number of slots is equal to or less than a predetermined number, a communication re-establishing step of establishing communication with the wireless terminal that is switching channels in response to the incoming call, and a program for executing Medium.